It is indeed an automatic (look at the specs). This is #059, has to be. Now we also know this engine has 500 hp and 570 Nm. The kit costs 40.000 euro and there are 4 cars build with this compressor. And the engine comes from the Volkswagen Phaeton.

A total of 14 Double 12's have been build. - We have 15 in the register but that can be explained by the fact that we included the 12 cilinder prototypes #055 and #056, the C12 Spyder and the La Turbie respectively. So that would make 13 Double 12's. If that's the case we are missing one.
The one of the article is the last one build. - That's, as other forum members pointed out allready, highly unlikely. It has the same building caracteristics as #069 that was made in 2006.
This one has an automatic gearbox from a V.W. Phaeton. - I know only one other Double 12 with the same color combination, that one is also Super Charged but doesn't have an automatic gearbox.
There are 4 Double 12's with a MTM Super Charger. - We have three in the register...

So I do believe this is an unknown Double 12. It's the only one to have a Super Charger in combination with an automatic gearbox. I don't see any of the Super Charger badges that the other three Super Charged Double 12's have, so I think the Super Charger of this particular Double 12 was fitted afterwards.